Reduce export service sample height

Author: dobromirts

docs/angular/src/content/en/components/exporter-csv.mdx

@@ -117,7 +117,7 @@ public exportButtonHandler() {
 
 ```
 
-<Sample src="/services/export-csv-sample-1" height={600} alt="" />
+<Sample src="/services/export-csv-sample-1" height={300} alt="" />
 
 ## Customizing the Exported Format
 

docs/angular/src/content/jp/components/exporter-csv.mdx

@@ -117,7 +117,7 @@ public exportButtonHandler() {
 
 ```
 
-<Sample src="/services/export-csv-sample-1" height={600} alt="" />
+<Sample src="/services/export-csv-sample-1" height={300} alt="" />
 
 ## エクスポート形式のカスタマイズ